Stampless envelope



FIG. 1 is a front elevational view of a stampless envelope, the indicia depicted by means of broken lines in the upper left corner being shown for illustrative purposes only and forming no part of the claimed design; and,

FIG. 2 is a rear elevational view thereof.

It is understood that the sides of the envelope are of no substantial thickness. 

The ornamental design for a stampless envelope, as shown and described. 